This converter turns inches into centimeters instantly, using the exact factor 1 inch = 2.54 centimeters. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Exactly 25.4 millimetres since the 1959 international yard agreement. One hundredth of a metre, and the everyday metric unit for body measurements and paper sizes.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
inches- The amount you are converting, measured in inches
2.54- The exact number of centimeters in one inch
centimeters- The converted result
How it works, step by step
- Enter the number of inches you want to convert.
- The value is multiplied by 2.54, the exact conversion factor.
- The result is displayed in centimeters, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 inches
Multiply 5 by 2.54. That gives 12.7 centimeters. A quick sanity check: one inch is larger than one centimeter, so the number should get bigger — and it does.
Converting 72 inches
72 × 2.54 = 182.88 centimeters. Working backwards, 182.88 ÷ 2.54 returns 72 inches, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many centimeters are in one inch?
Exactly 2.54. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert inches to centimeters?
Centimeters = inches × 2.54. To reverse it, divide instead: inches = centimeters ÷ 2.54, which is the same as multiplying by 0.3937007874.
Is the inch bigger than the centimeter?
Yes. One inch equals 2.54 centimeters, so it is the larger unit.
Why does my answer differ slightly from other inches to cm converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a inch?
Exactly 25.4 millimetres since the 1959 international yard agreement.
What is a centimeter?
One hundredth of a metre, and the everyday metric unit for body measurements and paper sizes.
Inches to centimeters reference table
| Inches | Centimeters |
|---|---|
| 0.5 in | 1.27 cm |
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 75 in | 190.5 cm |
| 100 in | 254 cm |
| 250 in | 635 cm |
| 500 in | 1,270 cm |
| 1000 in | 2,540 cm |
Exact factor: 1 inch = 2.54 centimeters. Values rounded for display.